Satin hair color, formulated with its unique micro color molecule technology, has created the longest lasting permanent hair color available. Contrastingly, Satin Hair Color can be mixed with a unique processing lotion, turning Satin Hair Color into a semi-permanent color which washes from the hair in 4 to 6 weeks. A unique blend of proteins and a rich reconstructive base actually leaves your hair looking healthier, shinier, and in better overall condition than before you started.